Question

我正在尝试使用列表框并使用以下语法进行多选，但这不起作用。

<?= $form->field($model, 'weekday')->listBox([
       'monday'=>'Monday',
        'tuesday'=>'Tuesday',
        'wednesday'=>'Wednesday',
        'thursday'=>'Thursday',
        'friday'=>'Friday',
        'saturday'=>'Saturday',
        'sunday'=>'Sunday'],['multiple'=>true,'size'=>7])

            ?>

我能够在列表框中进行多选，但它返回一个空值。如果我正在使用multiple'=>true部分，那么它将返回正确的值，但之后我无法进行多选。

我在这里做错了什么？

感谢。

约会模型中的相关代码.php

公共职能规则（） {

    return [
        [['appointment_date'], 'safe'],
        [['priority', 'weekday'], 'string', 'max' => 20]
    ];

}

控制器代码：

public function actionCreate()
    {
        $model = new Appointment();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

在aragachev

的答案中更新建议代码后我得到的错误的堆栈跟踪

获取未知属性：app \ models \ Appointment :: weekday 1.在第143行的E：\ wamp \ www \ HospitalErp \ vendor \ yiisoft \ yii2 \ base \ Component.php 134135136137138139140141142143144145146147148149150151152

 foreach ($this->_behaviors as $behavior) {
            if ($behavior->canGetProperty($name)) {
                return $behavior->$name;
            }
        }
    }
    if (method_exists($this, 'set' . $name)) {
        throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
    } else {
        throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);//line 143
    }
}

/**
 * Sets the value of a component property.
 * This method will check in the following order and act accordingly:
 *
 *  - a property defined by a setter: set the property value
 *  - an event in the format of "on xyz": attach the handler to the event "xyz"

2. in E:\wamp\www\HospitalErp\vendor\yiisoft\yii2\db\BaseActiveRecord.php – yii\base\Component::__get('weekday') at line 247
3. in E:\wamp\www\HospitalErp\vendor\yiisoft\yii2\helpers\BaseArrayHelper.php – yii\db\BaseActiveRecord::__get('weekday') at line 190
4. in E:\wamp\www\HospitalErp\vendor\yiisoft\yii2\widgets\DetailView.php – yii\helpers\BaseArrayHelper::getValue(app\models\Appointment, 'weekday') at line 209
5. in E:\wamp\www\HospitalErp\vendor\yiisoft\yii2\widgets\DetailView.php – yii\widgets\DetailView::normalizeAttributes() at line 123
6. in E:\wamp\www\HospitalErp\vendor\yiisoft\yii2\base\Object.php – yii\widgets\DetailView::init()

Answer 1

原因是StringValidator附加了模型规则中的weekday属性：

[['priority', 'weekday'], 'string', 'max' => 20],

由于multiple => true选项，您正在接收数组，而不是字符串（即使在一次选择的情况下）。它根本没有通过验证。

Yii 2中没有内置数组验证器。

1）由于您需要多次选择，我建议您将weekday重命名为weekdays。

2）我建议将工作日列表放在单独的方法中：

public static function getWeekdaysList()
{
    return [
        'monday' => 'Monday',
        'tuesday' => 'Tuesday',
        'wednesday' => 'Wednesday',
        'thursday' => 'Thursday',
        'friday' => 'Friday',
        'saturday' => 'Saturday',
        'sunday' => 'Sunday',
    ];
}

3）创建inline validator，例如：

public function validateWeekdays ($attribute, $params)
{
    $label = '«' . $this->getAttributeLabel($attribute) . '»';

    // Checking if it's array first
    if (is_array(!$this->$attribute)) {    
        $this->addError($attribute, "$label must be array.");

        return;
    }

    $allowedWeekdays = array_keys(static::getWeekdaysList());

    // Checking if every selection is in list of allowed values
    foreach ($this->$attribute as $weekday) 
    {
        if (!in_array($weekday, $allowedWeekdays)) {
            $this->addError($attribute, "$label - $weekday is not in allowed list");

            return;
        }
    }
}

详细了解offical guide中的内联验证器。

4）在模型规则中将其附加到weekdays：

['weekdays', 'validateWeekDays'],

如果您不想验证weekDays，则应明确将其标记为安全属性，以便将其与其他属性进行大规模分配：

['weekdays', 'safe'],

5）在视图中，您可以将代码简化为：

<?= $form->field($model, 'weekdays')->listBox(Appointment::getWeekdaysList(), [
    'multiple' => true,
    'size' => 7,
]) ?>

还有一句话 - weekday这是一个工作日，不包括周六和周日。更正确的形式是一周中的天。

Yii2：listbox的正确语法？

1 个答案: